Brazing: the route, the tolerances it holds, materials and design tips, with an indicative cost. One of 56 processes in the free finder.
JoiningFamily
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Brazing joins metal with a filler that melts above 450 C but below the base metals, drawn into the joint by capillary action without melting the parts.
At a glance
When to use it, and when not
Best for
Leak-tight joints in assemblies like heat exchangers, coils and tooling.
Watch for
Joint design and cleanliness are critical; the filler sets the service temperature.
Step by step
The typical route
Raw material to finished part. Steps vary with material, volume and tolerance; this is the free route from the finder.
Clean & flux
Clean the parts and apply flux.
Tooling - Tolerance - Lead -
Set gap
Set the capillary joint gap and fixture.
Tooling - Tolerance - Lead -
Braze
Furnace or torch braze with filler.
Tooling Furnace/torch Tolerance - Lead -
Clean
Remove flux residue.
Tooling - Tolerance - Lead -
Leak test
Pressure/leak test if required.
Tooling - Tolerance - Lead -
Materials
Materials it suits
Grade
Why it suits this
Copper/brass + filler
Plumbing, HVAC
Steel/stainless + filler
Assemblies
Carbide to steel
Tool tips
Design
Design tips
A few general pointers for Brazing. The full, part-specific DFM list is in the dossier.
Gap too big/small for capillary flow.Design the right clearance.
No filler reservoir / flow path.Add a groove/relief.
Cost
What it costs
Joins dissimilar metals and makes leak-tight joints (heat exchangers, carbide tips) below the base melting point.
PER-PART COST vs VOLUME
Per-part cost drops as volume spreads tooling and setup over more parts. The exact figures for your part at your volume, in your currency, are in the dossier.
MODEL EST.
$19 to 33per part at 1 off
A rough ballpark only. The dossier gives should-cost at your exact volume and currency, with the full breakdown.
GET THE FULL DOSSIER
Everything you need to quote and source it
The free route above is yours. To actually put a number on this process and buy it well:
Should-cost at your exact volume in 12 currencies, with the material, processing, tooling and overhead breakdown
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Brazing joins metal with a filler that melts above 450 C but below the base metals, drawn into the joint by capillary action without melting the parts. The typical route is: Clean & flux; Set gap; Braze; Clean; Leak test. Leak-tight joints in assemblies like heat exchangers, coils and tooling.
What does Brazing cost per part?
It depends on size, tolerance and volume. As a rough ballpark it starts around $19 to 33 per part at low volume and falls with quantity. The dossier gives should-cost at your exact volume and currency. Model estimates, not quotes.
What tolerance can Brazing hold?
It depends on the feature and the finishing operations used.
What materials suit Brazing?
Common choices are Copper/brass + filler (Plumbing, HVAC); Steel/stainless + filler (Assemblies); Carbide to steel (Tool tips).
See the exact route and should-cost for your part
The free finder maps your part to its process and full route. Pro adds should-cost at your volume, sourcing and an RFQ draft.
